Siemens 3RA21100KA151AK6 Combination Starter

Siemens 3RA21100KA151AK6 is a SIRIUS 3-pole combination starter (DOL S00) in the SZ 00 fuseless load feeder family, designed for direct-on-line starts of small three‑phase motors. It accepts a 120 VAC coil and is rated for a load current of 0.9 to 1.25 A, enabling motor power up to about 1/2 HP (roughly 370–750 W) and handling line voltages up to 690 VAC in compatible configurations. The unit uses screw-terminal connections and includes a Class 10 thermal overload relay for motor protection, all in a compact enclosure measuring approximately 167.2 mm high, 45 mm wide, and 97.1 mm deep. In non-enclosed installations it presents an IP00 rating, while mounting in a suitable enclosure yields IP20 protection. This Siemens starter is part of the SIRIUS line and is intended for panel-mited motor control where a fuseless direct-on-line starter with integrated overload provides compact, reliable starting for small motors.